.sidebar-nav {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--topbar-height));
    background: var(--secondary);
    z-index: 1020;
    border-right: 1px solid var(--glass-border);
    transform: translateX(-100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 1.5rem 0;
}

body.light-theme .sidebar-nav {
    background: #eef2f7;
}

.sidebar-nav.open {
    transform: translateX(0);
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-menu .nav-link {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.9rem 1.8rem;
    transition: var(--transition);
    border-left: 4px solid transparent;
}

.sidebar-menu .nav-link i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.sidebar-menu .nav-link:hover {
    color: var(--text-primary);
    background-color: var(--glass);
}

.sidebar-menu .nav-link.active {
    color: var(--accent);
    font-weight: 600;
    background: var(--glass);
    border-left-color: var(--accent);
}

@media (min-width: 992px) {
    .sidebar-nav {
        transform: translateX(0);
    }
    #main-container {
        padding-left: var(--sidebar-width);
    }
}

@media (max-width: 991px) {
    #sidebar-toggle {
        display: inline-flex;
    }
}

@media (max-width: 576px) {
    .sidebar-nav {
        width: 100%;
        transform: translateX(-105%);
    }
}

body.sidebar-open .sidebar-nav {
    transform: translateX(0);
}

body.sidebar-collapsed .sidebar-nav {
    transform: translateX(-100%);
}

body.sidebar-collapsed #main-container {
    padding-left: 0;
}